cthumb allows you to create Web albums of digital pictures with thumbnails, captions, and several different views of the collection, including (optionally) several languages and resolutions. An album is composed of a series of pages, each composed of a collection of pictures. You can have several annotations per picture, and can customize almost everything in the way the albums look on the screen.
Deadman's Redirect is designed to replace whatever is loaded when you click on the Home button in your browser. It is a Web surfer's power tool that can be completely customized, using HTML, to fit the needs of the user. It allows for URL redirection as well as an interface to various search engines through its aliasing system. It also supports user-set aliases with functional arguments, RSS headlines, and a history of all the URLs that pass through it.
Enzyme is an architecture for creating user-searching-user applications. Right now, it is primarily useful as a resume create/search and HR management system. However, it's potential uses are wide-ranging, and it offers PHP developers an alternative to relying on simple "keyword" searching systems.
eXist is a native XML database featuring efficient, index-based XPath query processing, extensions for keyword search, XUpdate support, and tight integration with existing XML development tools. The database is lightweight and may be easily deployed in a number of ways, running either as a stand-alone server process, inside a servlet engine, or directly embedded into an application.
mp3riot (formerly known as f2html.pl) is a command line utility that searches recursively through directories, builds a file list (with additional file information), and generates HTML files, playlists, etc. The output can be controlled, links can be corrected, and more. The script is mainly desigend to create Web pages, playlists, and databases for MP3 and Ogg files, but can also used for other purposes.
FemFind is a crawler and search engine for SMB shares (provided by Samba/Unix or Windows) and FTP servers. The crawler maps the filesystem structure of your shares to a MySQL database. Then, the Web interface or a Windows client can be used to quickly locate any file on the network.